Windmill



(No Model.)

P. A. NORBERG.

WINDMILL. No. 635,120. Patented Mar. 5, 1895.

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NITED STATES PETER A. NORBERG, OF ROSLYN, WASHINGTON.

WINDMILL.

EPECIFICATION forming part of Letters Patent N 0. 535,120, dated March5, 1895.

Application filed April 3, 1894:. fierial No. 506,193. (No model- To allwhom it may concern:

Be it known that LPETER A. NORBERG, of Roslyn, in the county ofKittitass and State of Washington, haveinvented a new and ImprovedWindmill, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved windmill,which is comparatively simple and durable in construction, veryeffective in operation,and adapted to utilize the force of the wind tothe greatest advantage.

The invention consists of certain parts and.

details, and combinations of the same, as will be hereinafter describedand then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement on the line 11of Fig. 2. Fig. 2 is a sectional plan view of the same onthe line 2-2 ofFig.1. Fig. 3 is an enlarged sectional plan view of one of the platesand part of the wing frame; and Fig. 4 is a side elevation of the same.

The improved windmill is provided with the vertically-disposedwind-wheel shaft A, journaled in suitable hearings in the tower B andconnected at its lower end in the usual manner with the machinery to bedriven. On the shaft A is secured the wind wheel provided with wings 0extending radially from a shaft, as plainly illustrated in Fig. 2. Anydesired number of such wings may be employed and sets of wings may bearranged one above the other, as indicated in Fig. 1.

Each wing O is provided with awing frame composed of thehorizontally-extending arms D and D fastened to the shaft A and con--nected with each other at their outer ends by 2. The ends of the bladesare slightly beveled and the lower bevel E of each blade is adapted toswing into a correspondinglyshaped recess D formed in the top of thelower arm D, so as to limit the opening and closing movement of theblade, as will be readily understood by reference to Fig. 3. Therecess 1) forms the shoulders D D so that the blade E in swinging open,as indicated in Fig. 3, stands at an acute angle to the arm D to permitthe wind to readily open the blade without swinging the same past acentral or right angular position relative to the arm D. When the bladeE is closed then it stands nearlyin alignmentwith the arms D,D' and thefree end of one blade abuts against the trunnion end of the nextfollowing blade, with the outermost blade resting with its free endagainst the corresponding post D Now, when the several parts are inposition as illustrated in Figs. 1 and 2 and the wind blows in thedirection of the arrow at, then the wings to the left of the shaft Aclose, while those on the right hand side of the shaft swing rearwardlyinto an open position, to permit the wind to readily pass through thewings without the latter offering great resistance. Thus,it will be seenthat the force of the wind is utilized principally on one side of thewheel and little resistance is offered on the other side, so that thepower of the wind is utilized to the greatest advantage.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent-- 1. Awind wheel,comprising two sets of radial arms spaced apart, one set being providedwith recesses to form limiting shoulders, and blades pivoted between thearms with one end in the recesses thereof, substantially as described.

2. A windmill provided with a wind wheel, comprising a shaft, sets ofradial arms extending from the said shaft, the lower arm being formedwith a beveled recess forming limiting shoulders, and blades havingvertically-disposed trunnions journaledin the said arms, the lower endof each blade being beveled to fit into the said recess to abut againstthe shoulders thereof, substantially as shown and described.

3. A wind wheel, comprising two sets of Pa,- 5 dial arms D D spacedapart, the lower set D being provided with the angular recesses D havinginclined bottoms, and the Wings E having beveled ends and provided withtrune nions Eand E the said wings being pivoted between the arms Withone end in the said re- IO cesses, substantially as herein shown and de-

